Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

[pandora-kernel.git] / block / blk-core.c

diff --git a/block/blk-core.c b/block/blk-core.c
index 2987fe4..1905aab 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -482,6 +482,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
        kobject_init(&q->kobj, &blk_queue_ktype);
 
        mutex_init(&q->sysfs_lock);
+       spin_lock_init(&q->__queue_lock);
 
        return q;
 }
@@ -544,10 +545,8 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
         * if caller didn't supply a lock, they get per-queue locking with
         * our embedded lock
         */
-       if (!lock) {
-               spin_lock_init(&q->__queue_lock);
+       if (!lock)
                lock = &q->__queue_lock;
-       }
 
        q->request_fn           = rfn;
        q->prep_rq_fn           = NULL;
@@ -807,35 +806,32 @@ static struct request *get_request_wait(struct request_queue *q, int rw_flags,
        rq = get_request(q, rw_flags, bio, GFP_NOIO);
        while (!rq) {
                DEFINE_WAIT(wait);
+               struct io_context *ioc;
                struct request_list *rl = &q->rq;
 
                prepare_to_wait_exclusive(&rl->wait[rw], &wait,
                                TASK_UNINTERRUPTIBLE);
 
-               rq = get_request(q, rw_flags, bio, GFP_NOIO);
-
-               if (!rq) {
-                       struct io_context *ioc;
-
-                       blk_add_trace_generic(q, bio, rw, BLK_TA_SLEEPRQ);
+               blk_add_trace_generic(q, bio, rw, BLK_TA_SLEEPRQ);
 
-                       __generic_unplug_device(q);
-                       spin_unlock_irq(q->queue_lock);
-                       io_schedule();
+               __generic_unplug_device(q);
+               spin_unlock_irq(q->queue_lock);
+               io_schedule();
 
-                       /*
-                        * After sleeping, we become a "batching" process and
-                        * will be able to allocate at least one request, and
-                        * up to a big batch of them for a small period time.
-                        * See ioc_batching, ioc_set_batching
-                        */
-                       ioc = current_io_context(GFP_NOIO, q->node);
-                       ioc_set_batching(q, ioc);
+               /*
+                * After sleeping, we become a "batching" process and
+                * will be able to allocate at least one request, and
+                * up to a big batch of them for a small period time.
+                * See ioc_batching, ioc_set_batching
+                */
+               ioc = current_io_context(GFP_NOIO, q->node);
+               ioc_set_batching(q, ioc);
 
-                       spin_lock_irq(q->queue_lock);
-               }
+               spin_lock_irq(q->queue_lock);
                finish_wait(&rl->wait[rw], &wait);
-       }
+
+               rq = get_request(q, rw_flags, bio, GFP_NOIO);
+       };
 
        return rq;
 }